| 摘要 |
PURPOSE:To provide an air battery that restricts the permeation of steam and carbonic acid gas in the air into the inner part, enables discharge for a long period of time, has excellent retention characteristics, and fully prevents the leakage of an alkaline electrolyte by using a composite film with excellent oxygen gas selection transmission capacity. CONSTITUTION:The air hole 8 of a metal air battery is blocked up from the inner part of the battery by using a composite film 9 with two-layer structure in which a thin layer made of metal oxide provided with oxygen adsorption capacity is integratedly attached to one side of a porous film with micropores of 0.1mum or less in pore diameter. For example, such a porous film can include a porous fluororesin film, porous polycarbonate film, porous cellulose ester film, and polyethylene film. A metal oxide containing water or hydrate can include tin dioxide, zinc oxide, aluminum oxide, manganese oxide, calsium oxide, strontium oxide, barium oxide, titanium dioxide, silicate dioxide, and such. Though this composite film has an extremely thin thickness, it will not transmit steam in the air. As a result, the film has an excellent oxygen gas selection transmission capacity. |
